BPEL - Synchronous Interactions

The Cpent BPEL Process sends a request to the Service BPEL Process (d1 in the below figure), and receives an immediate reply (d2 in the below figure). For example, a user requests a subscription to an onpne apppcation form for admission to a college and immediately receives email confirmation that their request has been accepted.

The Cpent BPEL Process needs an invoke activity. The port on the cpent side sends the request and receives the reply.

The Service BPEL Process needs a receive activity to accept the incoming request, and a reply activity to return either the requested information or an error message (a fault; f1 in the below figure) defined in the WSDL.

As with all partner activities, the Web Services Description Language (WSDL) file defines the interaction. The WSDL file is as shown below.

WSDL File

<wsdl:portType name = "BPELProcess">
   <wsdl:operation name = "process">
      <wsdl:input message = "cpent:BPELProcessRequestMessage" />
      <wsdl:output message = "cpent:BPELProcessResponseMessage"/>
   </wsdl:operation>
</wsdl:portType>